Methods and systems are presented for diagnosing a breach of an evaporative emissions system. The methods and systems include repurposing a resonator as a vacuum reservoir to reduce a pressure of an evaporative emissions system so that it may be determined if there is or is not a breach of the evaporative emissions system.

A system for distilling water is disclosed. The system comprises a heat source, and a plurality of open-cycle adsorption stages, each stage comprising a plurality of beds and an evaporator and a condenser between a first bed and a second bed, wherein each bed comprises at least two vapor valves, a plurality of hollow tubes, a plurality of channels adapted for transferring water vapor to and from at least one of the condenser or the evaporator, a thermally conductive water vapor adsorbent, and wherein each vapor valve connects a bed to either the condenser or the evaporator.

The apparatus for producing liquid water from ambient air includes a lower frame and an upper cover defining an inner space, and at least one air inlet in the lower frame. An adsorption and desorption module is arranged in the inner space with a bed of adsorbent material. A ventilator varies between a first mode in which it imposes vertical forced circulation of the ambient air, and a second mode in which the upper cover acts as a condenser for the ambient air. A valve is arranged in the upper cover to allow the ambient air to flow from the inner space to the outside environment when the ventilator is in the first mode, the valve being otherwise closed. An electronic unit switches the ventilator selectively into the first mode during a period of night time and into the second mode during a period of day time.

A media design for modular use in an air cleaning or HVAC systems to removes gas phase contaminants. The design allows for a control of gas contaminant removal using variable media length, path length, and contact time to ensure a contained MTZ length and low pressure drop. In one embodiment, the design includes a filter module at an angle to an airflow and an air filter mounted within the filter frame. The filter module may include channels therethrough that are oriented at the optimum angle in relation to the airflow to provide the required dwell time and pressure drop for a given application.

An air filtering system includes a main system and a filtering module. The main system includes a main body having an air inlet, an air flow cover having an air outlet, and a primary filtering core replaceably disposed in the main body, wherein the air flow cover is detachably coupled at the main body to form a basic air filtering mode for filtering air from the air inlet to the air outlet through the primary filtering core. The filtering module is detachably coupled between the main body and the air flow cover to form an advanced air filtering mode, wherein the filtering module includes a secondary filtering core arranged for filtering the air after passing through the primary filtering core and before existing the air outlet.

An adsorbent material module includes a plurality of tubular adsorbent materials and a plurality of medium materials. Each of the tubular adsorbent materials includes at least one channel and at least one adsorbent layer. The adsorbent layer surrounds the at least one channel. The medium materials are coated on two ends of each of the tubular adsorbent materials, respectively, and the medium materials have a thermal conductivity function or an electrical conductivity function.

An carbon molecular sieve for adsorbing water molecules in an alcohol solution to separate an alcohol from the water molecules, wherein the total volume of pores with an inlet diameter of 0.33 nm or more as determined by a molecular probe method is not less than 3 times the total volume of pores with an inlet diameter of 0.46 nm or more. This carbon molecular sieve is an alcohol concentration material that is capable of efficiently concentrating alcohol without performing a distillation step and that is easily reusable.

A carbon dioxide recovery system is configured to separate carbon dioxide from gas containing the carbon dioxide via an electrochemical reaction and includes an electrochemical cell including a working electrode and a counter electrode. The working electrode includes a CO.sub.2 adsorbent. The CO.sub.2 adsorbent is configured to, when a first voltage is applied between the working electrode and the counter electrode, take in electrons flowing from the counter electrode to the working electrode and adsorb the carbon dioxide by a Coulomb force of the electrons without bonding to the carbon dioxide by sharing an electron orbital with the carbon dioxide. The CO.sub.2 adsorbent is configured to, when a second voltage different from the first voltage is applied between the working electrode and the counter electrode, discharge the electrons from the working electrode to the counter electrode and desorb the carbon dioxide.

A canister includes a filling chamber and an internal structure. The filling chamber is filled with activated carbon. The internal structure includes a first component and a second component that are arranged in the filling chamber. The first component is located at a position that is different from a position of the second component in a flow direction of an evaporated fuel in the filling chamber and is positioned such that at least a portion thereof does not overlap in position with the second component when projected onto a plane perpendicular to the flow direction.

A SO.sub.2 adsorption material, a preparation method therefor and an application thereof, and a method for removing SO.sub.2 from flue gas containing SO.sub.2 are provided. The SO.sub.2 adsorption material contains a carbonized metal organic framework material and a sulfite loaded on the carbonized metal organic framework material, and the carbonized metal organic framework material is a carbonized material obtained by carbonizing a metal organic framework material. On the basis of the total weight of the SO.sub.2 adsorption material, the loading amount of sulfite is not higher than 10 wt %. The SO.sub.2 adsorption material has a relatively high SO.sub.2 adsorption capacity, and may be desorbed and regenerated by heating, and the adsorption capacity still remains at a relatively high level after multiple cycles of adsorption-desorption.